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I-D ACTION:draft-cordell-midcom-span-a-00.txt



A New Internet-Draft is available from the on-line Internet-Drafts directories.


	Title		: SPAN-A - Candidate A for the Pre-Midcom SPAN Protocol
	Author(s)	: P. Cordell
	Filename	: draft-cordell-midcom-span-a-00.txt
	Pages		: 42
	Date		: 26-Jun-02
	
SPAN-A (pronounced 'spanner') is a candidate for the pre-midcom SPAN
protocol.  The scope of SPAN (Simple Protocol for Augmenting NATs) is
to enable protocols involving multiple associated sessions to operate
across NATs.  Such protocols typically use transport addresses to
identify associated sessions.  This works well for environments where
end-to-end addressing is in force, but is broken by the introduction
of NATs.  SPAN is intended to operate with symmetric NATs by using a
relay outside the NAT.  It complements STUN [STUN] which operates
with various kinds of cone NAT.

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